Fire-extinguishing apparatus.



" paratus, of wh h the fol FRANS JOHAN HENRIK RUSTIGE, 0F LILLA ESSINGEN, STOCKHOLM, SWEDEN.

FIRE-EXTINGUISHING APPARATUS.

Application filed October 28, 1913.

To all whom, it may] concern Be it known that I, FRANS JOHAN HENRIK RITSIIGE, a subject of the King of Sweden, residing at Lilla Essingen, Stockholm, Sweden, have invented new aigd useful Improveto Fir Xtinguishing Apowing is a speciments Relatin fication.

Devices for au omatic fire extinguishing are known which consist of a pipe system connected to a receptacle f0 liquid carbon dioxid and provided with discharge openings closed by a readily fusible substance which is melted by fire arising adjacent to the opening and thereby discharge carbon dioxid which chokes the fire. If, however, the pipe system, as generally is preferred in practice, is arranged at the top of the rooms or chambers to be protected, it may happen that the discharged carbon dioxid, although heavy, does not sink to the bottom of the room or chamber, where the fire usually begins,-especially in the ease of coal bunkers, but the gas will be retained at the top on account of the air currents caused by the fire and thus be inactive during a considerable time, or until a sufficient quantity of carbon dioxid has escaped to fill the room.

The purpose of the presentinvention is to avoid the said inconvenience, and this is accomplished by combining with the pipe system arranged at the top of the chambers branch pipes which lead to or adjacent to the bottom of the rooms, the sealing piecesof readily fusible metal then being arranged at the branching points, i. e. at the top of the room where they are most readily available for theaction of a rising temperature in the room. By this arrangement, when fire arises for instance at the bottom of a coal bunker, the carbon dioxid which is emitted from an opening near the fire place will be led to the bottom of the bunker through the branch pipe and will thus have better access to the fire than if it were emitted at the top.

Specification of Letters Patent.

Patented May 30, 1916. Serial No. 797,802.

However, if fire is also spread to the upper parts of the bunker or room, the carbon dioxid will soon choke it as it rises on account of the draft caused by the fire.

In the accompanying drawing, a ship provided with a fire extinguishing system according to the present invention is shown in a longitudinal vertical section.

1 is a receptacle for liquid carbon dioxid, from which a pipe leads to a system of pipes 2 distributed along the compartments of the ship. The said pipes 2 run at the top of the compartments, rooms or bunkers and are provided with valves 5 opening by the fusion of a metal piece. From said valves, branch pipes 3 run down through the compartments so as to have their mouths 4 near the bottom thereof.

Having now particularly described the nature of my invention and the manner of its operation, what I claim is:

An apparatus for automatically extinguishing fire by means of carbon dioxid, comprising a source of supply of liquid carbon dioxid, a system of substantially horizontal pipes connected with said source and arranged at the top'of the rooms to be protectec, normally closed valves situated in said pipes at suitable points, thermostatic controlling means for each valve carried directly thereby, and stationary branch pipes leading fromthe respective valves down to' a level substantially at the bottom of the rooms, the lower end of each branch pipe being open and disposed directly beneath the corresponding valve and its thermostatic means. I

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANS JOHAN HENRIK RUSTIGE. Witnesses:

BIRGER NoRoFELor, ADA SIMON. 

